.app{
	width: 100%;
	height: 100vh;
	background-color: #fff;
	position: relative;
	display: flex;
	justify-content: center;
	align-items: center;
}
.nav84{
	position: relative;
	display: flex;
	justify-content: center;
	align-items: center;
}
.nav-a84{
	width: max-content;
	padding: 10px 8px 10px 32px;
	margin: 0 10px;
	font-size: 16px;
	line-height: 1;
	letter-spacing: 2px;
	color: #000;
	text-decoration: none;
	cursor: pointer;
	position: relative;
	display: block;
}
.nav-a84:before,.nav-a84:after{
	content: '';
	width: 10px;
	height: 3px;
	background-color: #888;
	position: absolute;
	left: 8px;
	top: 18px;
	transition: all 0.2s linear;
}
.nav-a84:after{
	left: 14px;
}
.nav-a84:hover:before{
	transform: rotate(45deg);
}
.nav-a84:hover:after{
	transform: rotate(-45deg);
}